feat: add missing greek translations and improve existing ones

[aris1009]

Hi!

• give existing greek translations a face-lift; bit more formal
• add missing translations

[GyulyVGC]

Thank you!
Really kind from you to also take care of improving the existing translations 🙌

[aris1009]

Thank you! Really kind from you to also take care of improving the existing translations 🙌

Thanks for the effort you have put in the project. I also looked into a font issue, in 2 places I noticed some Greek capital letters are clipped and I think the reason is letters Ζ Η Θ Ι Λ Ο Υ Χ Ψ Ω are missing from resources/fonts/full/subset_characters.txt.
Should I raise another PR to commit updated fonts, or would you like to regenerate the fonts yourself?

[GyulyVGC]

Don't worry about that... each time there's some new characters I run a script to update the subsetted font 👍

[GyulyVGC]

@all-contributors please add @aris1009 for translation.

[allcontributors]

@GyulyVGC

I've put up a pull request to add @aris1009! 🎉